/* Base Styles */
:root {
    --color-background: #121212;
    --color-surface: #1e1e1e;
    --color-surface-variant: #2d2d2d;
    --color-primary: #bb86fc;
    --color-primary-variant: #3700b3;
    --color-secondary: #03dac6;
    --color-error: #cf6679;
    --color-on-background: #e1e1e1;
    --color-on-surface: #ffffff;
    --color-on-primary: #000000;
    --color-on-secondary: #000000;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--color-background);
    color: var(--color-on-background);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-secondary);
}

img {
    max-width: 100%;
    height: auto;
}

button {
    cursor: pointer;
    font-family: 'Noto Sans JP', sans-serif;
}

section {
    padding: var(--spacing-lg) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-on-surface);
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--color-primary);
}

.section-header p {
    font-size: 1.2rem;
    color: var(--color-on-background);
    max-width: 600px;
    margin: 0 auto;
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(18, 18, 18, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
    padding: var(--spacing-sm) 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-on-surface);
    margin: 0;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav li {
    margin-left: var(--spacing-md);
}

.main-nav a {
    color: var(--color-on-background);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.download-btn {
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    color: var(--color-on-primary) !important;
    padding: 0.5rem 1.5rem !important;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.language-switch {
    display: flex;
    align-items: center;
}

.language-switch button {
    background: none;
    border: none;
    color: var(--color-on-background);
    font-size: 0.9rem;
    padding: 0.3rem 0.6rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.language-switch button.active {
    background-color: var(--color-surface-variant);
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-on-background);
    position: absolute;
    left: 0;
    transition: all var(--transition-normal);
}

.mobile-menu-btn span:nth-child(1) {
    top: 0;
}

.mobile-menu-btn span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.mobile-menu-btn span:nth-child(3) {
    bottom: 0;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(18, 18, 18, 0.9), rgba(30, 30, 30, 0.8));
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(187, 134, 252, 0.1), transparent 70%),
                radial-gradient(circle at 70% 70%, rgba(3, 218, 198, 0.1), transparent 70%);
    z-index: -1;
}

.hero-content {
    flex: 1;
    padding: 0 var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-on-surface);
    line-height: 1.2;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease forwards 0.3s;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-on-background);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease forwards 0.6s;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    color: var(--color-on-primary);
    padding: 1rem 2rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease forwards 0.9s;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    color: var(--color-on-primary);
}

.hero-visual {
    flex: 1;
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-container {
    position: relative;
    width: 100%;
    height: 70%;
    max-width: 600px;
}

.hero-image {
    position: absolute;
    width: 80%;
    height: 80%;
    border-radius: var(--border-radius-lg);
    background-size: cover;
    background-position: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
}

.hero-image-1 {
    top: 0;
    left: 0;
    background-color: #3a3a3a;
    animation: fadeIn 1s ease forwards 1.2s;
    z-index: 3;
    transform: rotate(-5deg);
}

.hero-image-2 {
    top: 10%;
    left: 10%;
    background-color: #4a4a4a;
    animation: fadeIn 1s ease forwards 1.5s;
    z-index: 2;
    transform: rotate(3deg);
}

.hero-image-3 {
    top: 20%;
    left: 20%;
    background-color: #5a5a5a;
    animation: fadeIn 1s ease forwards 1.8s;
    z-index: 1;
    transform: rotate(-2deg);
}

/* Features Section */
.features {
    background-color: var(--color-surface);
    padding: var(--spacing-xl) 0;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.feature-category {
    margin-bottom: var(--spacing-lg);
}

.feature-category h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    text-align: center;
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background-color: var(--color-surface-variant);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    background-color: rgba(187, 134, 252, 0.1);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card h4 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-on-surface);
}

.feature-card p {
    color: var(--color-on-background);
    font-size: 1rem;
    margin-top: auto;
}

/* Demo Section */
.demo {
    background-color: var(--color-background);
    padding: var(--spacing-xl) 0;
}

.demo-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.demo-item h3,
.demo-controls h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.comparison-slider {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

.before-after-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.before-image,
.after-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #3a3a3a;
    background-size: cover;
    background-position: center;
}

.after-image {
    width: 50%;
    overflow: hidden;
    border-right: 2px solid var(--color-primary);
}

.image-label {
    position: absolute;
    bottom: 20px;
    padding: 5px 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--color-on-surface);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
}

.before-image .image-label {
    right: 20px;
}

.after-image .image-label {
    left: 20px;
}

.slider-handle {
    position: absolute;
    top: 0;
    left: 50%;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    cursor: ew-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-on-primary);
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    top: 50%;
}

.slider-handle::before,
.slider-handle::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 15px;
    background-color: var(--color-on-primary);
}

.slider-handle::before {
    transform: translateX(-5px);
}

.slider-handle::after {
    transform: translateX(5px);
}

.demo-controls {
    display: flex;
    flex-direction: column;
}

.control-group {
    margin-bottom: var(--spacing-md);
}

.control-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-on-background);
    font-weight: 500;
}

.effect-control {
    width: 100%;
    padding: 0.8rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-surface-variant);
    background-color: var(--color-surface);
    color: var(--color-on-surface);
    font-family: 'Noto Sans JP', sans-serif;
}

input[type="range"].effect-control {
    -webkit-appearance: none;
    height: 8px;
    background: var(--color-surface-variant);
    border-radius: 4px;
    outline: none;
    padding: 0;
}

input[type="range"].effect-control::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
}

.apply-effect {
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    color: var(--color-on-primary);
    border: none;
    padding: 1rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    margin-top: auto;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.apply-effect:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.gallery {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.gallery h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    text-align: center;
}

.gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.gallery-item {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
    cursor: pointer;
}

.gallery-item:hover {
    transform: scale(1.03);
}

.gallery-image {
    height: 250px;
    background-color: #3a3a3a;
    background-size: cover;
    background-position: center;
}

.gallery-caption {
    padding: var(--spacing-sm);
    background-color: var(--color-surface-variant);
    color: var(--color-on-background);
    font-size: 0.9rem;
}

/* Tips Section */
.tips {
    background-color: var(--color-surface);
    padding: var(--spacing-xl) 0;
}

.tips-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.tip-item {
    margin-bottom: var(--spacing-md);
    background-color: var(--color-surface-variant);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.tip-header {
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.tip-header:hover {
    background-color: rgba(187, 134, 252, 0.1);
}

.tip-header h3 {
    margin: 0;
    font-size: 1.3rem;
    color: var(--color-on-surface);
}

.accordion-icon {
    color: var(--color-primary);
    transition: transform var(--transition-normal);
}

.tip-header[aria-expanded="true"] .accordion-icon {
    transform: rotate(180deg);
}

.tip-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
    display: none;
}

.tip-content.active {
    display: block;
}

.tip-content p {
    margin-bottom: var(--spacing-md);
    color: var(--color-on-background);
}

.tip-image {
    height: 200px;
    background-color: #3a3a3a;
    border-radius: var(--border-radius-sm);
    background-size: cover;
    background-position: center;
}

/* Versions Section */
.versions {
    background-color: var(--color-background);
    padding: var(--spacing-xl) 0;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background-color: var(--color-surface-variant);
}

.timeline-item {
    display: flex;
    justify-content: flex-start;
    padding-bottom: var(--spacing-lg);
    position: relative;
}

.timeline-item:nth-child(even) {
    justify-content: flex-end;
}

.timeline-marker {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-primary);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.timeline-marker span {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-on-primary);
}

.timeline-content {
    width: 45%;
    background-color: var(--color-surface-variant);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.timeline-content p {
    color: var(--color-on-background);
    font-size: 1rem;
}

/* Download Section */
.download {
    background-color: var(--color-surface);
    padding: var(--spacing-xl) 0;
}

.download-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.system-requirements h3,
.support-links h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.system-requirements ul {
    list-style: none;
}

.system-requirements li {
    margin-bottom: var(--spacing-xs);
    color: var(--color-on-background);
}

.download-button-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.download-button {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    color: var(--color-on-primary);
    padding: 1rem 2rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    margin-bottom: var(--spacing-sm);
    width: 100%;
    max-width: 300px;
}

.download-button svg {
    margin-right: 10px;
}

.download-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    color: var(--color-on-primary);
}

.download-note {
    font-size: 0.9rem;
    color: var(--color-on-background);
    opacity: 0.8;
}

.support-links {
    display: flex;
    flex-direction: column;
}

.support-link {
    display: flex;
    align-items: center;
    color: var(--color-on-background);
    margin-bottom: var(--spacing-sm);
    padding: 0.8rem;
    border-radius: var(--border-radius-sm);
    background-color: var(--color-surface-variant);
    transition: all var(--transition-fast);
}

.support-link svg {
    margin-right: 10px;
    color: var(--color-primary);
}

.support-link:hover {
    background-color: rgba(187, 134, 252, 0.1);
    color: var(--color-primary);
}

/* Footer */
.footer {
    background-color: var(--color-background);
    padding-top: var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-logo p {
    color: var(--color-on-background);
    opacity: 0.8;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.footer-nav h3,
.footer-external h3,
.footer-language h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.footer-nav ul,
.footer-external ul {
    list-style: none;
}

.footer-nav li,
.footer-external li {
    margin-bottom: var(--spacing-xs);
}

.footer-nav a,
.footer-external a {
    color: var(--color-on-background);
    opacity: 0.8;
    transition: all var(--transition-fast);
}

.footer-nav a:hover,
.footer-external a:hover {
    color: var(--color-primary);
    opacity: 1;
}

.language-buttons {
    display: flex;
}

.language-buttons button {
    background: none;
    border: 1px solid var(--color-surface-variant);
    color: var(--color-on-background);
    padding: 0.5rem 1rem;
    margin-right: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.language-buttons button.active {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border-color: var(--color-primary);
}

.copyright {
    text-align: center;
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-surface-variant);
}

.copyright p {
    color: var(--color-on-background);
    opacity: 0.6;
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .download-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .system-requirements, .download-button-container, .support-links {
        text-align: center;
    }
    
    .support-link {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 var(--spacing-sm);
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        flex-direction: column;
        height: auto;
        padding-top: 100px;
        padding-bottom: var(--spacing-lg);
    }
    
    .hero-content {
        padding: 0 var(--spacing-sm);
        text-align: center;
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-visual {
        height: 400px;
    }
    
    .demo-container {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        justify-content: flex-start;
        padding-left: 60px;
    }
    
    .timeline-item:nth-child(even) {
        justify-content: flex-start;
    }
    
    .timeline-marker {
        left: 30px;
    }
    
    .timeline-content {
        width: 100%;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .language-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .feature-cards {
        grid-template-columns: 1fr;
    }
    
    .gallery-container {
        grid-template-columns: 1fr;
    }
}

/* Mobile Menu */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--color-surface);
    z-index: 999;
    padding: 80px var(--spacing-md) var(--spacing-md);
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav ul {
    list-style: none;
}

.mobile-nav li {
    margin-bottom: var(--spacing-md);
}

.mobile-nav a {
    color: var(--color-on-background);
    font-size: 1.2rem;
    font-weight: 500;
    display: block;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-surface-variant);
}

.mobile-nav a:hover {
    color: var(--color-primary);
}

.mobile-nav .download-btn {
    display: inline-block;
    margin-top: var(--spacing-md);
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-md);
    max-width: 90%;
    max-height: 90%;
    overflow: auto;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: var(--color-on-background);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1;
}

.modal-image {
    max-width: 100%;
    max-height: 80vh;
    display: block;
}

.modal-caption {
    padding: var(--spacing-md);
    color: var(--color-on-background);
    text-align: center;
}

/* Scroll to Top Button */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    z-index: 99;
}

.scroll-top.active {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: var(--color-primary-variant);
    transform: translateY(-3px);
}

/* Loading Animation */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-background);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(187, 134, 252, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}